Circuit breaker



0a. 2,1928. 1,685,934 A. H. BAKKEN CIRCUIT BREAKER Filed July 9 l 4Sheets-Sheet 1 I i iii a u ATTORNEY Oct. 2, 1928. 1,685,934

A. H. BAKKEN CIRCUIT BREAKER Filed July 9; 1921 4 Sheets-Sheet 2WITNESSES: INVENTOR Oct. 2, 1928.

S A. H. BAKKEN CIRCUIT BREAKER Filed July 9, 1921 4 Sheets-$heet 3 I.24: r a i l l l T Q I {I i I m I6 16' 1 15 I W J 1 I in: I f 4 o q/44 lI 1 .24 e4 1% Q? o WITNESSES:

; ATTORNEY Oct. 2,1928. 1,685,934

A. H. BAKKEN CIRCUIT BREAKER Filed July 9. 1921 4 she ts-sheet 4 jgld II 0 I 0 I m E I l l I o a X o t 31 3'1 WITNESSES: INVENTOR ,Bdfilm.

i tank employed by; me.

' the members Patented Oct. 2, 1928.

ANDREW H. BAKKEN, 0E PITTSBURGH,

HOUSE ELEoTEIo' & MANUFACTURING" ooMP nY; A CO PORA ION OF rE vNsYL IVANIA.

CIRCUIT Application fi1ed July '9;

My invention relates to electrical circuit;

breakers and more particularly to} operating: mechanisms therefor andtheir supporting structures.-

One of the objectsof my invention is to:

simplify and'to reduce the cost of construction of. circuit breakers,with special refer encejtoihose of the fluid-immersed type.

Another object of my invention is to so form. certain .portions oi":-the .circuit breaker that they may 'be'stamped out of sheet-metal,

' thus'avoiding the necessityiot employing an unnecessary number'ofcastmetal parts and eliminating the, machiningaoperations which havebeeniheretofore deemed necessary;

Another object of my invention is to provide. circuit, breaker: in whicha maximum effectiveness:of'bperation is secured at a;mini-- mumcostoficonstruction 1 As shown in. the accompanyingldrawings': Fig. 1 isaview,.partially: in=side elevation and partially in:section:, of-avcircuit breaker constructed. 'n "accordance with my invention, and takenonthe line II'of. Fig. 2.

,Fig. .Zjis a view; partially in topjpla-n and,

partially 'ingse'ction, ofythe device ofFig; 11 Figs. .3 :and, 4 areplan and side elevational views, respectively, of the quenching fluidFigs; 5 andwG are :plan and side elevational views, respectively, ofthe: supporting frame work for the circuitinterrupter mechanism and thetanln 5 Figs. 7 and 8;are detail views of the toggle lever embodied inmyinvention? I Fig. 9:is a; detail vievv'of iii-glevershown in'Fig-L,, v p

. Fig. 10 's aside elevational view-of across bar. and the lifting rodscarried-thereby,

showing in end elevation, the movable con- Fig; 11 :is' a view of thelower portion :of Figbm taken at-right angles thereto.

I providea-supporting frame12" composed ofga base portion-1'3,bracingmembers 14; and bracket'members 15; i The bracket members 15'are'provided with-lug portions 16 by means 5 of Y which they are riveted to13vand 14. All of .these members', are of' stamped metal. The members 14are provided with holes 14a through which bolts may extend, tosecure-the apparatus to aw panel-board or .wall.

*The base: portion '13 is provided with open:-

the main 'operat- PENNSYL NIA, AssIGnoE TO; 'WESTING BREAKER.

"1921. serial- Nu. 483,384:

secured to the base means of the bolts18 I and wing nuts 20. Ribs 21 arestamped intothe base member "13 m order to impart greater strength andrigidity. thereto. The member ing-s 17.to1 1eceive-bolts 18, that arecarriedv by. a fluidt'quenching tank 19 The tank is 13isalso providedWiththree openings- 22, 1 through-\vlnch liit1ngrods23 .extend, and:

with openings 2 L throughi'which porcelain members 25 extend.

' The lifting rods 23 are preferably ofwood and at;theirquppervendsareclamp'e'd between cross bars- 26, of peculiar form, by means of bolts27. This manner of-holding'tlie rods is an improvement on the" formerpractice wherein a single perforated holding 1 member was provided into:which: the" end of the rod was inserted and the niatei'ial 1 then swagedinwardly. around the reduced .portion of: the

rod."' i 7 Besides effecting a more convenient" and secure connectionbetween the holdingimem her and"? the rods,mypc'onstruction elim inates; the: ,obj'ecti-onaltendency 1111 0116 former 1 tingo't theendsoftheir'odsn construction towardsthe breaking andisplit V a unit, throughamain operating lever 28 that has pivotalronn'ec'tion at 29lnwith thecross bars26z.

: Each: of the 'rods- 23 carries, at its lower end, aibridgingmember 3Othat-consists of two contact 1 ortions 3'1 clamped together as indicatedin Fig} 11' and keyed to-rthe lifting rods 23 topr'eventrotationwith;re'- spect theretok g] Pm.

The contact "faces 31 of the-bridgingmeme ber 30; are adaptedto makeengagement with stationary contact-members 52 tl1ata'reyieldinglysupported on conductors-33 which pass through the. 1porcelainmembers 25 "and are provided; at' their upper" ends-with termi nals-34n',H 1:". i The porcelain members -25 serve as insula torsia-rid assupportsfor the conductorsz33 and the; parts carriedi thereby. The.lower ends of the. porcelain members andthe coacting enlarged portionsof theqconductors' 33 arelof semi-cylindrical form, in orderthattheporcelains and theconductor's will-'benonrotatable with: respect toi; each :other. 1 The stationary contact members 32-;are sup,- portedfrom :the conductorsr33ibyflflexi-ble members 3 5, and shunt connections36 serve to conduct the current from contact members 32 to conductors33. Leaf springs37 norable insulating materia mally force the contactmembers 32'toward each other, and into close engagemen'twith the movablecontact members 31. By reason of the flexible mounting of thecontactmembers 32, they automatically align"themselves with the contact facesof the members 31.

The porcelain members are enlarged at their middle portions, as shownmore clearly insulate the respective sets of contact memf bers from eachother.

The tank 19 is'adapted to contain fluid for quenching arcs that may beformed during the operation of the circuit breaker.

The bolts 18 are secured to the corners of the tank, as shown in Figs. 3and 4, by means of rivets 18a. This'construction eliminates thenecessity of rivetingperforated blocks to the sidesofthe tank, for thepurpose of supporting the bolts 18. p Y

' It will be understood that each of the three rods 23 carries atitslower end. a bridging jmember 30 that has contact membersv 31adapted, at their opposite ends, to engage stationary contact memberscarried bytwo of the conductors 33, to complete a circuit across suchconductors. It will be apparent that: the flared 'wallsof the openingsin the base member 13 and the flared openingsin clamping plates 40areyielding and of such form, and co-actwith the enlarged vportions of theporcelains 25 in such manner, that any irregularities in engagingsurfaces may be automatically compensatedv for and the porcelain therebyproperly aligned and tightly embraced between the clamping members and Ithe base member. 5

the brackets 15 by 'a pin 'As the lever 28 The operating lever 28 ispivotally connected at 29 to the pair of cross bars 24, and at its'oppositeend it' is pivotally supported on is'moved about its pivot 45,it raises and lowers the lifting rods 23 and the contact members 31carried thereby, to. open and close the circuits. A'toggle lever46,that=is pivotally supported on-the brackets 15 by a pin 47, pivotallysupports a link 48 that is connected to the operating lever 28 by a pin49. V i

An operating rod is connected to the toggle lever 46, by a pin 60, thatextends through slots 61 in the brackets 15. As the operating rod ismoved, motion is transmitted through the togglelever 46 and the link 48to the operating lever 26. In the normal operation of late 40, in themanner shown in the device the operating rod 50 is moved upwardly toclose the circuits inthe manner heretofore'described and locked in suchposition by any desired means. Upon release of the operating rod 50, apair of tension springs 52, each of which has one end secured to'thepin49 and its other end secured to the pin 47,

serve to return the moving parts of the apparatus to open position andthereby break the circuits.

The toggle rated extensions 54,- 55, and 56 so that the operatingrod- 50maybe operated from any desired direction. For instance, in the formillustrated herein, the link 48 and the rod 50 are connected to theextensions and ,56 respectively, whereas if it be found necessary toplace the rod 50 in a horizontal position it may be connected to theextension 55' and the link 48 to the extension 54, while to operate milk46 is provided with perfothe rod 50vdownwardly fromthe extension 56 vand from beneath the lower member 14, the

extension54could be connected to the link 48. If the range of movementof the rod 50 were limited, itcouldbe connected to the extension 55and'the extension 54 connected to the link 48.

r Various changes detail and general ar rangement may be madewithout'departing from the spirit of the invention as shown in theaccompanying claims.

Iclaim as my invention: a :7

1. In a circuit breaker, the combination of a pressedmetal supportingmemberpro' videcl with openings therethrough,insulating membersextending throughthe openings, means for attaching the'insulatingmembers-to the supporting'member, means whereby the insulating and thesupporting members are automatically aligned regard faces, conductormembers disposed within the insulating membersand each provided with anenlarged portion adjacentto' one end of its associated insulatingmember, *the enlarged portion of the conductor'and the said end of theinsulating member-being provided with cooperatlng engaging faces of suchcontour that the conductors are nonro-' tatable with respect to the,insulating mem bers. Y

less of irregularities on their engaging sur- 2. In combination, astamped metal supporting member for circuit breakers provlded withanopening having flaring walls,

a conductor member extending through said opening and provided with anenlarged por tion adjacent thereto, a clamping member provided with anopening that has its walls flared oppositely to those of thesupportingmember, and means for securing thesaid enlarged portion flared betweenthe walls of said openings. Q: I

3.-In combinatioma stamped metal supporting member for circuitbreakers,-provided with openings'having upwardly flaring Walls,conductor members extending through sald openings and provided withenlarged portions, perforated clamping members, the openings of whichare provided with Walls flared oppositely to those of the supportingmember, and 'means for securing the said enlarged portions between saidoppositely disposed flared Walls of the supporting member and theperforated clamping members.

4. In combination, an insulating member, a second member mounted in thefirst named member and extending exteriorly thereof, and means forpreventing the rotatable displacement between the said memberscomprising a semi-cylindrical surface on one end of said insulatingmember and a cooperating grooved surface on the other member.

5. In combination, a cylindrical insulating member, .a conducting membermounted in the first named member and extending exteriorly thereof,means for clamping the said member in a predetermined relative position,

and means for preventing therelative rotatable displacement of saidmembers combushing'and insulating member, a conducting member movablymounted Within the cylindrical member and extending exteriorly thereof,and means for preventing rotatable movement between the cylindricalmember and the conducting member comprising an extended surface on oneof the" members and a. cooperatingindented surface on the other member.

In testimony whereof, I have hereunto subscribed my name this 24th dayof June, 1921. a 1

ANDREW in BAKKEN.

